Pneumatic shifting device for movable members of an automatic musical instrument.



M. ULARK.

PNEUMATIG SHIETING DEVICE FOR MOVABLB MEMBERS 0F AN AUTQMA'HG MUSICAL INSTRUMENT;

' APPLIUATIOE PILE@ DEG. G, 1909. EENEWED SEPT. 8, 1911,

1,006,371. Patented im. 10, 19171.

UNirED srATEs i MELVILLE CLARK, OFCHICAGO, ILLINOIS.`

menuiserie surname DEVICE ron 1,005,771. spammen of rginal application filed April 8, 1909, Serial No. 488,625. Divided and 1909, Serial No. 531,475. Renewed September 8, 1911.

To all whom 'it may concern:

Be it known that I, MELviLLE CLARK, a citizen of the United States, residing atA Chicago, inthe county of Cook and State of Illinois, have invented new and useful Improvements in Pneumatic Shifting Devices for Movable Members of an Auto- -matic Musical Instrument of which the following is a specification,reference being had to the accompanying drawings', forming a part thereof.

This application is a division of my application #488,625, filed April 8, 1909.

-It relates to automatic devices for shifting movable members in an automatic musical instrument.

It consists of the features shown and described as indicated claims. l.

i In the drawings z-Figure 1, is a partly diagr of construction in the ammatic view representing a portion of' a tracker-board of a pneumatic musical instrument, and ducts leading from apertures thereof to a valve-controlling device, the latter being shown in plan view.

Fig. 2 isa side elevation of the valve-controlling device 4and. adjacent portions of the wind mechanism of an auto-pneumatic musical instrument Vwith which said device is aS- sociated. Fig. 3 is a fore-and-aft verticall section to the line 33 of Fig. 1 through said valve-controlling device.- Fig. 4 is a section at the line 4--4 on Fig. 3.

In the drawings, this' invention is illustrated as `applied to the purpose of operating the valve which controls connection of the main air chamber with exhaust air d'evices, the latter not being specifically illustrated, but it should be understood thatl it is not limited to merely operating the said valve, but-it is applicable to any part of a musical instrument/whichrequires to `be shifted back and forth for different resuits' in the operation of the instrument.

Only such part-s of a musical instrument are shown, as are necessary to \illustrate the operation of the invention. f The tracker-board, 1, may be understood to be of usual construction for the usual purpose of such tracker-boards, viz. l mgo operating with a perforated music asheet for controlling the pneumatic.Q .,otioir'ofthe'` MovABLE MEMBERS orv ANVAUTOMATIC MUsicAL INSTRUMENT.

Patented oct. 10, 191.1.

this application jled December 6, Serial No. 648,399. Y

Letters Patent.

dition to the ordinary ducts for controllingsounding devices, additional ducts, 2 and 3, .preferably one to each end of the trackerboard, which are connected by tubes, 4 and 5, with thel valve-governing device. This valve-governing device comprises Aa small exhaust or rareied air chamber, 6, which is connected by a trunk tube,'7, with the main lexhaust airchamber, Al of the pneumatic action. In th'is small exhaust chamber they are mounted on a support, 9, two primary pneumatics, 10 and 11, with which are connected the tubes, 4 and '5, above mentioned. The two primary pneumatics have their moving walls connected lby a loop, 12, so that they move together, kand each of said pneumatics is collapsed when the4 other expands. The primary pneumatic, v10, carmanner of a primary pneumatic to control a motor pneumatic, 14, which is mounted outside such chamber, 6.

It will be seen that for collapse of the motor pneumatic, 14, the primary pneumatic, 11, will be' inflated, and for inflation of said motor pneumatic, 14, the primary pneuir tic, 10, will be inflated. The inflation oi the primary pneumatic, 11,'whichV said primary pneumatic by the registration of a proper aperture of the perforated roll with the tracker -ductmouth, 3, at the right hand end of the tracker, will collapse the primary pneumatic, 10, (the usual bleeder n ot visible in the drawings being present) by reason of the rigid loop connecting them, but by reason of unpreventable leakage of the pneumatic 11 the twopneumatics would ing of the aperture:y in' the perforatedfroll provision were made tov thefcontrary.'`

-Such leading out through rib, 9, on the inner wall of the chamber, 6, on which rib the two primary pneumatics are both mounted, such way of said rib through the side ofthe chamber, 6,a valve, 18, being mounted upon the outerf-*side' of said chamber for closing. the'eiid of the duct, the motor pneumatic, "llfbeingconnected with 'such valve, 19, so

instrument with-which it is associated. For the purposesA of this invention it has, ad.-y

as to move the valve for closing the duct when theA motor pneumatic-'is inflated, and

occurs when atmospheric airis admitted to resume their normal position upon the passries a valve, 13, which operates in the usual l feo.

awayfrom .the duct mouth, 3, unless some '95 provision Yconsists in 'providingea duct, 16,

the partition bar 100 duct leadingout by to open the valve when the motor pneumatic is collapsed, such collapse occurring, it will be understood, when the primary pneumatic, 11, is inflated by registration of the proper aperture of the controlling sheet with the tracker-duct-mouth, 3. 1t thus results that when such registration has occurred and passed, the air supply to the primary pneumatic, l1, which is provided first by the registration ofthe controller sheet aperture with the tracker-board duct mouth, 3, is maintained afterward through the duct, 16, and the motor pneumatic, 14, is thereby held in collapsed position until an aperture at the other side ot the perforated sheet registers With'the tracker-board duct mouth, Q, causing the inflation of the primary pneumatic, 10, which reverses the valve, 13, admitting atmospheric air to the motor pneumatic, 14:, causing the latter to be inflated and close the valve, 16. The motor pneumatic, 14;, has its moving Wall connected. with the lever arm, 20, of rock shaft, 21, which, extending in through the end Wall of the exhaust chamber, A, operates by means of a second lever arm, 22, the valve, B, which controls the communication of said chamber, A, With the exhaust -devices for producing a different tension in said chamber from that which would be obtained therein if the valve remained closed. The particular construction of the exhaust devices and the connections leading to said valve, are not particularly illustrated any customary form of such devices, and connection being suitable for combination with the features of the invention already described, for producing the result which follows from the opening and closing of said valve, B, as 40 stated. For effecting the same result at will instead of by perforations in the controller t sheet, the tubes, et and 5, are branched intermediate the tracker-board and the connection of said tubes with the chamber, 6, the branches, -la and 5, being extended to valves, 25 and 2G, mounted in any convenient position, as, for example, at the edge of the instrument, in front of the manual, as illustrated, so that the operator can open one or the other of such valves 'with the same effect upon the action of the tivo primary pneumatics in the chamber, 6, as when said primaries are vented through the perforations of the controller sheet.

l claim 1. 1n an automatic playing device for musical instruments having a motor pneumatic for operating the movable part of the mechanism, in combination With such motor pneumatic and such movable part tWo primaries and a valve, to which they are both connected for controlling the motor pneumatic, separate connections for air to such primaries and means for controlling the admission of air thereto; mechanical connection 'between the moving members of the two primaries for collapsing each when the other is expanded; the primary Whose expansion operates the motor pneumatic controller valve for collapse of said motor pneumatic, having a supplementary air supply port and valve controlling suchport and connections from the moving Wall of the motor pneumatic for opening such valve by the collapsing movement of the motor pneumatic.

2. ln an automatic playing device for musical instruments having a motor pneumatic for operating a movable part of the mechanism, in combination with such movable part and motor pneumatic, .an exhaust air chamber and primary pneumatics therein, and a valve to which both said primaries are connected for controlling the motor pnemnatic; separate air connections for such primary pneumatics and means for controlling the admission of air thereto; said primary pneumatics having their moving members connected for the collaljjse of each when thfcv other is expanded, the motor pneumatic having its moving Wall exteriorl y exposed to atmospheric pressure; a duct leading from the exterior of the exhaust air chamber vinto the primary pneumatic Whose expanday of-December, 1909.

MELVILLE CLARK.

lVitnesses CHAS. S. BURTON, C. J. CHRIs'rorrnL. 

